Safety-hook



C. KNUDSEN.

SAFETY HOOKk APPLICATION man JuLYfi, 1913.

1,324-,67 6. Panama" Dee'. 9, 1919.

m 2716.56 6.5 l L J1/www0 z @QJ/mma JM U/moen Madsen CHRESTEN KNUDSEN,OF OTLND, MANE. L

SAFETY-HOOK.

Specification of Letters Patent.:

Patented Dec. 9, 1919.'

Application filed July 6, 19187. Serial 170,243,583.

To @ZZ whom 'it may'oofnocrn Be it knownthat I, Cnnns'rnN KNUnsnx, a.citizen ofthe United States,`residing at Portland, inthe county ofCumberland and State of Maine, have invented 'new and usefulImprovements in Safety-Hooks, of which the following` is aspeeiiication.

This invention relates to safety hooks especially designed for cargohoisting and lowering, the object in view being to provide a safe andreliable hook for the purpose stated, which is simple in construction,economical in manufacture, and which may be used with perfect safety inthe raising and lowering of heavy articles, the hook being speciallydesigned for marine use, but being, of course, valuable in otherconnections and uses which will suggest themselves.

With the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts, as herein described,illustrated and claimed.

In the accompanying drawings:

Figure l is a side elevation partly in section of the improved hook,showing` the latch or tongue in its closed position.

Fig. 2 is a similar view showing the open position of the latch ortongue.

Fig. 3 is a section on the line 3 3 of' Fig. 1, to show thespring-.pressed pin housed in the latch, and arranged to be held underyielding pressure against the camface of the lug on the hook-body toprevent casual opening movement of the latch.

Referring to the drawings, l designates the body of the hook, which isso shaped that it may be drop forged from steel or any suitable metal,thereby rendering the same reliable for heavy duty work. As shown, thebody 1 is provided with a rope or cable receiving eye 2. The cableattaching means, however, may be of any sha-pe or construc-V tion,according to the particular use to which the hook is to be put. The billor point 3 of the hook is formed in opposite sides of the inner facethereof with notches or recesses 4 embodying two substantially straightshoulders or walls 5 and 6 arranged at an angle to each other to receiveand support against lateral and outward swinging movement, the freebifurcated end of a latch or tongue 7. The hook is further providedadjacent to the junction between the body 1 and the attaching means 2with a projecting lug 8, having a cam face 9, the purpose of which willappeal'.

The tongue or latch 7 is connected toy the lug 8 by means of a pivot 10and the heel ond of the latch is'formed'wit-h a rounded bearing face 11vand concentric with the pivot 10 and adapted t0 bear against andcooperateI with an opposed shoulder 12v as shown in Figs. 1 and 2, thusremoving most of the strain from the pivot 10 when any pressure isbrought to bear against the inner or under side of the latch-which wouldhave the effect of pressing the free end of the .latch outward. Thelatch is bifurcated or slotted adjacent to its pivot end as shown at 18to form a recess for the lug S and the latch is also formed with acentral longitudinal bore or socket 14 in which is placed a. compressionspring' '15, the inner end of which is supported by the inner end wall1G of the socket or recess 14. A pin 17 is inserted through theconvolutions of the spring 15 and is provided with a rounded head orshoe 18 which rides against the Cam face 9 .of the lug S in the back andforth pivotal movements of the latch or tongue 7 and thereby eectivelyprevents accidental movement of the latch from the closed position shownin Figs. 1 and 3 to the open position shown in Fig. 2. It Will also beobserved that outward movement of the free end of the latch 7 beyond thefully closed position of the latch is prevented by the strong bearing ofsaid e'nd against the inner side of the bill 3 of the hook, whilesidewise movement of said free end, when the latch is closed, isprecluded by the straddling of the bill portion between the recesses 4by the bifurcated end of the latch. The spring 15 .is completely housedwithin the socket in the latch member and the head 18 of the pin 17takes the wear, thereby protecting the spring and greatly increasing thelife thereof. A new pin 17 may be substituted for an old pin which hasbecome worn through sliding contact with the cam face 9 of the lug 8.The latch or tongue 7 is preferably formed of malleable iron or othermetal and as the body 1 will ordinarily be formed of a drop steelforging, an especially tough, durable and reli able safety hook isproduced.

.1. A safety hook comprising a hookshaped body and a movable latch; thebody having attaching means, a lug at the inner side of the bodyadjacent to said attaching means anden which is a cam face opposite thebill of the body, shoulders at opposite sides of said lug, and recessesin opposite sides ofthe inner side portion of the bill, and the latchbeing pivoted to the body lugr eccentrically to the cam face thereof andhaving a rounded inner end to bear against the shoulder of the body andalso having a bifnrcated free end to engage the recessed inner side ofthe bill and bear outwardly against the bill, and a spring-pressed pinhoused in the latch and arranged when the latch tends to open, to exertyielding pressure against the cam face of the lug on the body.

2. A safety hook comprising a hookshaped body and a movable latch; thebody having attaching means and a portion at the inner side of the bodyadjacent to said attaching means and on which is a cani face oppositethe bill of the body, and the latch being, pivoted to the said 'bodyportion eccentrically to the cam face thereof and arranged When closedto bear outwardly against the inner side of the bill of the body, andspring-pressed means carried by the latch and arranged when the latchtends to swing toward the open position, to exert yielding pressureagainst the cam face of the said body portion.

In testimony whereof I afx my signature.

CHRESTEN KNUDSEN.

